Update readme setup section

README.md

@@ -37,6 +37,7 @@ The process to use this module goes as follows (WIP):
         short_dom: {e.g. b23, b01-1}
         long_dom: {e.g. bl23b}
         desc: {beamline description}
+        url: {e.g. b23-opis.diamond.ac.uk}
 
     components:
         {component name}:
@@ -48,6 +49,7 @@ The process to use this module goes as follows (WIP):
     ```
     > [!NOTE] 
     > `extras` is optional, but allows any embedded screen to be added to make a summary screen e.g. combining all imgs, pirgs and ionps associated with a vacuum space.
+4. Create a `techui-support.yaml` file inside `ixx-services/synoptic/techui-support`. To get started this file can be left empty.
 1. Run this command to locally generate a schema, which can be used for validation testing
 
     ```$ techui-builder --schema```